<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- header_tag -->
<html lang="en">
<head>
<title>Internal backend properties - LilyPond program-reference</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="description" content="LilyPond program-reference">
<meta name="generator" content="makeinfo 4.11">
<link title="Top" rel="start" href="index.fr.html#Top">
<link rel="up" href="Backend.fr.html#Backend" title="Backend">
<link rel="prev" href="User-backend-properties.fr.html#User-backend-properties" title="User backend properties">
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
<meta http-equiv="Content-Style-Type" content="text/css">
<style type="text/css"><!--
pre.display { font-family:inherit }
pre.format { font-family:inherit }
pre.smalldisplay { font-family:inherit; font-size:smaller }
pre.smallformat { font-family:inherit; font-size:smaller }
pre.smallexample { font-size:smaller }
pre.smalllisp { font-size:smaller }
span.sc { font-variant:small-caps }
span.roman { font-family:serif; font-weight:normal; }
span.sansserif { font-family:sans-serif; font-weight:normal; }
hr { border:0; height:1; color: #000000; background-color: #000000; }
/* hr {
border: none;
height: 1px;
color: #666666;
background-color: #666666;
}
body {
border-left: 1px solid #666666;
border-right: 1px solid #666666;
color: #332d28;
margin-right: auto;
margin-left: auto;
width: 60em;
list-style-type: square;
font-family: Arial,Helvetica,sans-serif;
padding-right: 1em;
padding-left: 1em;
}
a {
border-bottom: 1px dashed #344242;
text-decoration: none;
color: #344242;
}
a:link {
text-decoration: none;
}
a:visited {
border-bottom: 1px dashed #666666;
color: #666666;
}
a:active {
border-bottom: 1px solid #00cccc;
color: #00cccc;
}
a:hover {
border-bottom: 1px solid #1d7b85;
color: #1d7b85;
}
blockquote {
border: 1px solid #cccccc;
padding: 3px;
width: 40em;
}
.node {
border-left: 1px solid #666666;
margin: -0.5em 0px 1em;
padding: 2px 1px 0px;
font-style: italic;
}
.node a {
border: none;
text-decoration: underline;
font-style: normal;
font-weight: bold;
}
.verbatim {
font-family: "Courier New",Courier,monospace;
}
.unnumberedsubsubsec {
font-size: large;
color: #1d7b85;
}
.subsubheading {
font-size: large;
color: #3b220d;
}
.contents {
border: 1px dashed #339999;
margin: 3px 2em;
list-style-type: square;
padding-right: 1em;
width: 40em;
background-color: #fcfff9;
}
.contents a {
border-bottom: 1px dashed #423d34;
text-decoration: none;
color: #423d34;
}
.contents a:visited {
border-bottom: 1px dashed #666666;
color: #666666;
}
.contents a:active {
border-bottom: 1px solid #f0d86d;
color: #f0d86d;
}
.contents a:hover {
border-bottom: 1px solid #3b220d;
color: #3b220d;
}
.menu {
border-left: 1px dashed #339999;
margin: 3px 2em 1em;
list-style-type: square;
padding-left: 1.4em;
width: 40em;
}
.unnumbered {
}
h2 {
font-size: x-large;
color: #1d7b85;
}
*/
--></style>
</head>
<BODY BGCOLOR=WHITE TEXT=BLACK>
<div class="node">
<p>
<a name="Internal-backend-properties"></a>
Previous: <a rel="previous" accesskey="p" href="User-backend-properties.fr.html#User-backend-properties">User backend properties</a>,
Up: <a rel="up" accesskey="u" href="Backend.fr.html#Backend">Backend</a>
<hr>
</div>
<h3 class="unnumberedsec">Internal backend properties</h3>
<dl>
<dt><code>X-common</code> (layout object)<dd>Common reference point for axis group.
<br><dt><code>Y-common</code> (layout object)<dd>See <code>X-common</code>.
<br><dt><code>accidental-grob</code> (layout object)<dd>The accidental for this note.
<br><dt><code>accidental-grobs</code> (list)<dd>An alist with <code>(</code><var>notename</var><code> .
</code><var>groblist</var><code>)</code> entries.
<br><dt><code>add-cauda</code> (boolean)<dd>Does this flexa require an additional cauda on
the left side?
<br><dt><code>add-join</code> (boolean)<dd>Is this ligature head-joined with the next one
by a vertical line?
<br><dt><code>add-stem</code> (boolean)<dd>Is this ligature head a virga and therefore needs
an additional stem on the right side?
<br><dt><code>adjacent-hairpins</code> (unknown)<dd>A list of directly neighboring
hairpins.
<br><dt><code>adjacent-pure-heights</code> (vector)<dd>Used by a <code>VerticalAxisGroup</code> to
cache the <code>Y-extent</code>s of different column ranges.
<br><dt><code>all-elements</code> (unknown)<dd>A list of all grobs in this line. Its
function is to protect objects from being garbage collected.
<br><dt><code>arpeggio</code> (layout object)<dd>A pointer to an <code>Arpeggio</code> object.
<br><dt><code>ascendens</code> (boolean)<dd>Is this neume of ascending type?
<br><dt><code>auctum</code> (boolean)<dd>Is this neume liquescentically augmented?
<br><dt><code>axis-group-parent-X</code> (layout object)<dd>Containing X axis group.
<br><dt><code>axis-group-parent-Y</code> (layout object)<dd>Containing Y axis group.
<br><dt><code>bar-extent</code> (pair of numbers)<dd>The Y-extent of the actual bar line.
This may differ from <code>Y-extent</code> because it does not include the dots in
a repeat bar line.
<br><dt><code>bars</code> (unknown)<dd>A list of bar line pointers.
<br><dt><code>beam</code> (layout object)<dd>A pointer to the beam, if applicable.
<br><dt><code>begin-of-line-visible</code> (boolean)<dd>Used for marking <code>ChordNames</code>
that should only show changes.
<br><dt><code>bounded-by-me</code> (unknown)<dd>A list of spanners that have this
column as start/begin point. Only columns that have grobs or act as
bounds are spaced.
<br><dt><code>bracket</code> (layout object)<dd>The bracket for a number.
<br><dt><code>cause</code> (any type)<dd>Any kind of causation objects (i.e., music, or perhaps
translator) that was the cause for this grob.
<br><dt><code>cavum</code> (boolean)<dd>Is this neume outlined?
<br><dt><code>circled-tip</code> (boolean)<dd>Put a circle at start/end of hairpins (al/del
niente).
<br><dt><code>columns</code> (unknown)<dd>A list of grobs, typically containing
<code>PaperColumn</code> or <code>NoteColumn</code> objects.
<br><dt><code>conditional-elements</code> (unknown)<dd>Internal use only.
<br><dt><code>context-info</code> (integer)<dd>Within a ligature, the final glyph or shape of
a head may be affected by the left and/or right neighbour head.
<code>context-info</code> holds for each head such information about the left and
right neighbour, encoded as a bit mask.
<br><dt><code>cross-staff</code> (boolean)<dd>For a beam or a stem, this is true if we
depend on inter-staff spacing.
<br><dt><code>delta-position</code> (number)<dd>The vertical position difference.
<br><dt><code>deminutum</code> (boolean)<dd>Is this neume deminished?
<br><dt><code>descendens</code> (boolean)<dd>Is this neume of descendent type?
<br><dt><code>details</code> (list)<dd>Alist of parameters for detailed grob behavior.
<p>More information on the allowed parameters can be found by inspecting
<samp><span class="file">lily/slur-scoring.cc</span></samp>, <samp><span class="file">lily/beam-quanting.cc</span></samp>, and
<samp><span class="file">lily/tie-formatting-problem.cc</span></samp>. Setting <code>debug-tie-scoring</code>,
<code>debug-beam-scoring</code> or <code>debug-slur-scoring</code> also provides
useful clues.
<br><dt><code>direction-source</code> (layout object)<dd>In case <code>side-relative-direction</code> is
set, which grob to get the direction from.
<br><dt><code>dot</code> (layout object)<dd>A reference to a <code>Dots</code> object.
<br><dt><code>dots</code> (unknown)<dd>Multiple <code>Dots</code> objects.
<br><dt><code>elements</code> (unknown)<dd>A list of grobs; the type is depending on
the grob where this is set in.
<br><dt><code>encompass-objects</code> (unknown)<dd>Objects that a slur should avoid
in addition to notes and stems.
<br><dt><code>figures</code> (unknown)<dd>Figured bass objects for continuation line.
<br><dt><code>flexa-height</code> (dimension, in staff space)<dd>The height of a flexa shape in a ligature
grob (in <code>staff-space</code> units).
<br><dt><code>flexa-width</code> (dimension, in staff space)<dd>The width of a flexa shape in a
ligature grob in (in <code>staff-space</code> units).
<br><dt><code>font</code> (font metric)<dd>A cached font metric object.
<br><dt><code>glyph-name</code> (string)<dd>The glyph name within the font.
<br><dt><code>grace-spacing</code> (layout object)<dd>A run of grace notes.
<br><dt><code>head-width</code> (dimension, in staff space)<dd>The width of this ligature head.
<br><dt><code>heads</code> (unknown)<dd>A list of note heads.
<br><dt><code>ideal-distances</code> (list)<dd><code>(</code><var>obj</var><code> . (</code><var>dist</var><code> .
</code><var>strength</var><code>))</code> pairs.
<br><dt><code>important-column-ranks</code> (vector)<dd>A cache of columns that contain
<code>items-worth-living</code> data.
<br><dt><code>inclinatum</code> (boolean)<dd>Is this neume an inclinatum?
<br><dt><code>interfaces</code> (list)<dd>A list of symbols indicating the interfaces
supported by this object. It is initialized from the <code>meta</code> field.
<br><dt><code>items-worth-living</code> (unknown)<dd>A list of interesting items. If
empty in a particular staff, then that staff is erased.
<br><dt><code>join-heads</code> (boolean)<dd>Whether to join the note heads of an ambitus
grob with a vertical line.
<br><dt><code>join-right-amount</code> (number)<dd>DOCME
<br><dt><code>least-squares-dy</code> (number)<dd>The ideal beam slope, without damping.
<br><dt><code>left-items</code> (unknown)<dd>DOCME
<br><dt><code>left-neighbors</code> (unknown)<dd>A list of <code>spacing-wishes</code> grobs
that are close to the current column.
<p>The closest <code>spacing-wishes</code> determine the actual distances between the
columns.
<br><dt><code>linea</code> (boolean)<dd>Attach vertical lines to this neume?
<br><dt><code>meta</code> (list)<dd>Provide meta information. It is an alist with the
entries <code>name</code> and <code>interfaces</code>.
<br><dt><code>minimum-distances</code> (list)<dd>A list of rods that have the format
<code>(</code><var>obj</var><code> . </code><var>dist</var><code>)</code>.
<br><dt><code>normal-stems</code> (unknown)<dd>An array of visible stems.
<br><dt><code>note-columns</code> (pair)<dd>A list of <code>NoteColumn</code> grobs.
<br><dt><code>note-head</code> (layout object)<dd>A single note head.
<br><dt><code>note-heads</code> (unknown)<dd>A list of note head grobs.
<br><dt><code>oriscus</code> (boolean)<dd>Is this neume an oriscus?
<br><dt><code>padding-pairs</code> (list)<dd>An alist mapping <code>(</code><var>name</var><code> . </code><var>name</var><code>)</code>
to distances.
<br><dt><code>pedal-text</code> (layout object)<dd>A pointer to the text of a mixed-style piano
pedal.
<br><dt><code>pes-or-flexa</code> (boolean)<dd>Shall this neume be joined with the previous
head?
<br><dt><code>positioning-done</code> (boolean)<dd>Used to signal that a positioning element
did its job. This ensures that a positioning is only done once.
<br><dt><code>prefix-set</code> (number)<dd>A bit mask that holds all Gregorian head
prefixes, such as <code>\virga</code> or <code>\quilisma</code>.
<br><dt><code>primitive</code> (integer)<dd>A pointer to a ligature primitive, i.e., an item
similar to a note head that is part of a ligature.
<br><dt><code>pure-Y-common</code> (layout object)<dd>A cache of the
<code>common_refpoint_of_array</code> of the <code>elements</code> grob set.
<br><dt><code>pure-Y-extent</code> (pair of numbers)<dd>The estimated height of a system.
<br><dt><code>pure-Y-offset-in-progress</code> (boolean)<dd>A debugging aid for catching
cyclic dependencies.
<br><dt><code>pure-relevant-items</code> (unknown)<dd>A subset of elements that are
relevant for finding the <code>pure-Y-extent</code>.
<br><dt><code>pure-relevant-spanners</code> (unknown)<dd>A subset of elements that are
relevant for finding the <code>pure-Y-extent</code>.
<br><dt><code>quant-score</code> (string)<dd>The beam quanting score; stored for
debugging.
<br><dt><code>quantize-position</code> (boolean)<dd>If set, a vertical alignment is aligned
to be within staff spaces.
<br><dt><code>quantized-positions</code> (pair of numbers)<dd>The beam positions after
quanting.
<br><dt><code>quilisma</code> (boolean)<dd>Is this neume a quilisma?
<br><dt><code>rest</code> (layout object)<dd>A pointer to a <code>Rest</code> object.
<br><dt><code>rest-collision</code> (layout object)<dd>A rest collision that a rest is in.
<br><dt><code>rests</code> (unknown)<dd>A list of rest objects.
<br><dt><code>right-items</code> (unknown)<dd>DOCME
<br><dt><code>right-neighbors</code> (unknown)<dd>See <code>left-neighbors</code>.
<br><dt><code>script-stencil</code> (pair)<dd>A pair <code>(</code><var>type</var><code> . </code><var>arg</var><code>)</code> which
acts as an index for looking up a <code>Stencil</code> object.
<br><dt><code>separation-item</code> (layout object)<dd>A separation item.
<br><dt><code>shorten</code> (dimension, in staff space)<dd>The amount of space that a stem is shortened.
Internally used to distribute beam shortening over stems.
<br><dt><code>side-support-elements</code> (unknown)<dd>The side support, a list of
grobs.
<br><dt><code>skyline-distance</code> (number)<dd>The distance between this staff and the
next one, as determined by a skyline algorithm.
<br><dt><code>skyline-horizontal-padding</code> (number)<dd>For determining the vertical
distance between two staves, it is possible to have a configuration which
would result in a tight interleaving of grobs from the top staff and the
bottom staff. The larger this parameter is, the farther apart the staves
are placed in such a configuration.
<br><dt><code>slur</code> (layout object)<dd>A pointer to a <code>Slur</code> object.
<br><dt><code>spaceable-staves</code> (unknown)<dd>Objects to be spaced during page
layout.
<br><dt><code>spacing</code> (layout object)<dd>The spacing spanner governing this section.
<br><dt><code>spacing-wishes</code> (unknown)<dd>List of note spacing or staff spacing
objects.
<br><dt><code>staff-symbol</code> (layout object)<dd>The staff symbol grob that we are in.
<br><dt><code>stem</code> (layout object)<dd>A pointer to a <code>Stem</code> object.
<br><dt><code>stem-info</code> (pair)<dd>A cache of stem parameters.
<br><dt><code>stems</code> (unknown)<dd>A list of stem objects, corresponding to the
notes that the arpeggio has to be before.
<br><dt><code>stropha</code> (boolean)<dd>Is this neume a stropha?
<br><dt><code>tie</code> (layout object)<dd>A pointer to a <code>Tie</code> object.
<br><dt><code>tremolo-flag</code> (layout object)<dd>The tremolo object on a stem.
<br><dt><code>tuplet-number</code> (layout object)<dd>The number for a bracket.
<br><dt><code>tuplets</code> (unknown)<dd>A list of smaller tuplet brackets.
<br><dt><code>use-breve-rest</code> (boolean)<dd>Use breve rests for measures longer
than a whole rest.
<br><dt><code>virga</code> (boolean)<dd>Is this neume a virga?
<br><dt><code>x-offset</code> (dimension, in staff space)<dd>Extra horizontal offset for ligature heads.
</dl>
<!-- footer_tag --><br><hr>
<div class="node">
<p>
Previous: <a rel="previous" accesskey="p" href="User-backend-properties.fr.html#User-backend-properties">User backend properties</a>,
Up: <a rel="up" accesskey="u" href="Backend.fr.html#Backend">Backend</a>
</div>
<div style="background-color: #e8ffe8; padding: 2; border: #c0ffc0 1px solid;">
<p>
<font size="-1">
Cette page documente LilyPond-2.11.57 (branche de développement).
<br>
<address>
Rapportez toute anomalie en français à <a href="mailto:lilypond-user-fr@gnu.org">lilypond-user-fr@gnu.org</a> ou en anglais à <a href="http://post.gmane.org/post.php?group=gmane.comp.gnu.lilypond.bugs">http://post.gmane.org/post.php?group=gmane.comp.gnu.lilypond.bugs</a> </address>
<br>
Vos <a href="http://lilypond.org/web/devel/participating/documentation-adding">suggestions à propos de la documentation</a> sont les bienvenues.
</font>
</p>
</div>
</BODY></html>
